Everyone sees the unseen in proportion to the clarity of his heart, and that depends upon how much he has polished it. Whoever has polished it more sees more - more unseen forms become manifest to him.

Rumi (1207-1273), Jalāl ad-Dīn Muhammad Rūmī-more popularly simply as Rumi was a 13th-century Persian poet, faqih, Islamic scholar, theologian, and Sufi mystic originally from Greater Khorasan.